The PSU jobs are high paying Govt Jobs in the market today. But unfortunately, CSE students have the very limited number of vacancies in the Public sector undertakings.
For most of reputed CPSEs selection procedure is through GATE only, hence the competition level to get an executive job is too high.
The other point I want to share the Computer Science Engineers are recruited for the support service in these Companies/departments. So they have a limited growth in Govt sector.